Marlin Firearms Company Gas Service Station Sign – Porcelain – The Joker (Batman & Robin) sign. This vintage Marlin Firearms porcelain sign is a must-have for any gas and oil or advertising collectibles enthusiast. With the featured refinements of a Joker Guns Firearm Service Station and a Gas Pump, this sign is a unique piece of advertising that would make a great addition to any collection or display. The sign showcases the theme of Gas & Oil, and has excellent colors. Measuring at 12 inches, it is a great size for display in a service station or for your garage art in your man cave. The sign is in excellent condition and is a true gem for any collector. Vintage Marlin Firearms porcelain sign. The Joker from Batman and Robin. 12 inches in diameter. Vibrant colors and excellent porcelain.